Media resonance membrane separation wastewater treatment equipment and wastewater treatment methods

Abstract

This invention discloses a media resonance membrane separation wastewater treatment device and a wastewater treatment method. The media resonance membrane separation wastewater treatment device has a media resonance membrane separation structure; the media resonance membrane separation structure includes: a membrane separation component, including at least two membrane separation units, each membrane separation unit including a membrane filter and a product water pipe; a media resonance component, including at least two media resonance units, each media resonance unit including a media resonator and a support rod; a support pipe, the support pipe being connected to an outlet pipe; wherein, the membrane separation units and media resonance units are alternately arranged below the support pipe; the upper end of the product water pipe is connected to the support pipe; the upper end of the support rod is securely connected to the outside of the support pipe. This invention, by arranging the membrane separation units and media resonance units alternately, increases the filtration area and wastewater treatment efficiency, and can remove particulate matter deposited on the membrane surface through resonance, effectively mitigating membrane clogging and fouling.

Description

Technical Field

[0001] This invention relates to the technical field of wastewater treatment, and more particularly to the technical field of wastewater treatment during tunnel construction. Specifically, it relates to a medium resonance membrane separation wastewater treatment device and a wastewater treatment method. Background Technology

[0002] Tunnel construction wastewater contains a large amount of inorganic particulate pollutants, such as rock powder, silt, and cement particles. While larger inorganic particles in construction wastewater have high density, they can be rapidly removed through sedimentation. However, when the particle size of fine inorganic particles reaches the micrometer level, their settling rate is approximately one centimeter per hour, resulting in very low removal efficiency in ordinary sedimentation tanks. Although enhanced sedimentation measures, such as inclined plate sedimentation and flocculation sedimentation, increase sedimentation efficiency, the deposited fine particles tend to aggregate into denser masses. If the sediment is not cleaned promptly, this can lead to serious operational failures such as blockage, hardening, and even collapse. Therefore, achieving economical, efficient, and stable removal of fine inorganic particles from tunnel construction wastewater is a pressing engineering challenge that needs to be addressed.

[0003] Membrane separation technology utilizes a membrane with a certain pore size to separate insoluble particulate matter from the bulk liquid phase in wastewater under the action of a driving force. Membrane separation technology requires relatively mild operating conditions and has advantages such as simple operation, high separation efficiency, and good effluent quality. Applying membrane separation technology to tunnel construction wastewater treatment processes helps to achieve miniaturization and mobility of treatment devices, reducing the footprint, which is of great significance for wastewater treatment in mountainous engineering projects with limited space. However, the separated particulate matter accumulates on one side of the membrane, clogging the membrane pores and reducing water flux. In particular, membrane fouling, caused by microbial attachment and growth into biofilms, has become a major challenge for the development of membrane separation technology. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a medium resonance membrane separation wastewater treatment device and wastewater treatment method that has the advantages of membrane separation, reduces membrane blockage and membrane fouling, has a small footprint, and has high treatment efficiency.

[0005] To achieve the above objectives, the present invention first provides a media resonance membrane separation wastewater treatment device, the technical solution of which is as follows:

[0006] A media resonance membrane separation wastewater treatment device includes an inlet pipe and an outlet pipe, and further includes a media resonance membrane separation structure disposed between the inlet pipe and the outlet pipe. The media resonance membrane separation structure includes: a membrane separation assembly comprising at least two membrane separation units, each membrane separation unit including a membrane filter and a product water pipe; a media resonance assembly comprising at least two media resonance units, each media resonance unit including a media resonator and a support rod; and a support pipe connected to the outlet pipe. The membrane separation units and media resonance units are alternately arranged below the support pipe. The upper end of the product water pipe is connected to the support pipe. The upper end of the support rod is securely connected to the outside of the support pipe. Wastewater enters the area below the membrane separation assembly from the inlet pipe, and the clarified liquid after filtration by the membrane filter flows sequentially through the product water pipe, the support pipe, and the outlet pipe before being discharged. Particles adhering to the surface of the membrane filter are dislodged under the vibration of the media resonator.

[0007] As a further improvement to the above-mentioned medium resonance membrane separation wastewater treatment equipment: the supporting pipe is a ring pipe, and the membrane separation unit and the medium resonance unit are arranged in a ring.

[0008] As a further improvement to the aforementioned media resonance membrane separation wastewater treatment equipment: each membrane filter includes a membrane sheet arranged opposite to each other and a support and flow guiding mechanism located between the two membrane sheets. The angle between the membrane surface of the membrane sheet and the horizontal plane is 50-70°; the angle between the membrane sheet and the diameter of the supporting pipe is 11-14°; the membrane filter is placed at an angle of 45-60° with respect to the horizontal plane.

[0009] As a further improvement to the aforementioned media resonance membrane separation wastewater treatment equipment: each media resonator has two resonant diaphragms, and the resonant diaphragms are attached to the membrane sheet of the membrane filter.

[0010] As a further improvement to the aforementioned media resonance membrane separation wastewater treatment equipment: each media resonance unit includes two media resonators connected in series.

[0011] As a further improvement to the aforementioned media resonance membrane separation wastewater treatment equipment: the support rod has a hollow structure, and the conductive wires of the media resonator are located inside the support rod.

[0012] As a further improvement to the aforementioned media resonance membrane separation wastewater treatment equipment: the wastewater treatment equipment includes, from bottom to top, the following components: a chemical dosing and sludge collection zone, which is equipped with a chemical dosing pipe, a spiral filter press mechanism, and a sludge outlet; a buffer zone, the cross-sectional area of ​​which decreases from top to bottom; a water distribution zone, in which the inlet pipe is located; a sedimentation and separation zone, in which the membrane filter and the media resonator are arranged; and an overflow zone, in which an overflow trough is provided.

[0013] As a further improvement to the above-mentioned media resonance membrane separation wastewater treatment equipment: the dosing and sludge collection zone has a vertical pipe section and a conical pipe section, the dosing pipe is located in the vertical pipe section, the spiral filter press mechanism has variable diameter spiral blades adapted to the conical pipe section; the water inlet pipe is dendritic.

[0014] As a further improvement to the above-mentioned media resonance membrane separation wastewater treatment equipment: the height ratio of the dosing and sludge collection zone, buffer zone, water distribution zone, sedimentation and separation zone, and overflow zone is (4-5):(4-5):(2-3):(6-8):(0.8-1.5), and the volume ratio is (0.3-0.8):(8-10):(9-11):(20-25):(3-4).

[0015] To achieve the above objectives, the present invention further provides a wastewater treatment method, the technical solution of which is as follows:

[0016] The wastewater treatment method employs the aforementioned media resonance membrane separation wastewater treatment equipment.

[0017] As can be seen, the media resonance membrane separation wastewater treatment equipment of the present invention has a simple structure and small footprint. By arranging the membrane separation unit and the media resonance unit alternately, it not only increases the filtration area and improves the wastewater treatment efficiency, but also removes particulate matter deposited on the membrane surface through resonance, effectively reducing membrane clogging and pollution. It is very suitable for, but not limited to, treating tunnel construction wastewater, and has strong practicality.

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The accompanying drawings, which form part of this invention, are used to aid in understanding the invention. The content provided in the drawings and their related descriptions can be used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings:

[0020] Figure 1 This is a schematic diagram of the structure of the medium resonance membrane separation wastewater treatment equipment of Embodiment 1 of the present invention.

[0021] Figure 2 This is a top view of the media resonance membrane separation structure in the media resonance membrane separation wastewater treatment equipment of Embodiment 1 of the present invention.

[0022] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0023] Figure 4This is a schematic diagram of the membrane filter structure in the media resonance membrane separation wastewater treatment equipment of Embodiment 1 of the present invention.

[0024] Figure 5 This is a schematic diagram of the structure of the medium resonator in the medium resonator membrane separation wastewater treatment equipment of Embodiment 1 of the present invention.

[0025] Figure 6 This is a schematic diagram of the structure of the media resonance membrane separation wastewater treatment equipment in Embodiment 2 of the present invention.

[0026] Figure 7 This is a schematic diagram of the structure of the media resonance membrane separation wastewater treatment device according to Embodiment 3 of the present invention.

[0027] Figure 8 This is a top view of the media resonance membrane separation wastewater treatment device of Embodiment 3 of the present invention.

[0028] The relevant markings in the above figures are:

[0029] I - Dosing and sludge collection zone, II - Buffer zone, III - Water distribution zone, IV - Sedimentation and separation zone, V - Overflow zone, 100 - Inlet pipe, 110 - Main inlet pipe, 120 - Branch inlet pipe, 200 - Outlet pipe, 300 - Membrane separation unit, 310 - Membrane filter, 311 - Membrane sheet, 312 - Frame, 313 - Guide block, 314 - Outlet, 320 - Product water pipe, 400 - Media resonance unit, 410 - Media resonator, 4 11-Outer shell, 412-Positioner, 413-Fixed magnet, 414-Iron core, 415-Resonant plate, 416-Rigid rod, 417-Resonant diaphragm, 418-Coil, 419-Waterproof gasket, 420-Support rod, 500-Support pipe, 610-Dosing pipe, 621-Variable diameter spiral blade, 622-Shaft, 623-Motor, 630-Mulch outlet, 640-Vertical pipe section, 650-Conical pipe section, 700-Overflow trough. Detailed Implementation

[0030] The present invention will now be clearly and completely described in conjunction with the accompanying drawings. Those skilled in the art will be able to implement the present invention based on these descriptions. Before describing the present invention in conjunction with the accompanying drawings, it should be particularly noted that:

[0031] The technical solutions and features provided in the various parts of this invention, including the following description, can be combined with each other without conflict.

[0032] Furthermore, the embodiments of the present invention described below are generally only some, not all, of the embodiments of the present invention. Therefore, all other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0033] Regarding the terminology and units used in this invention: The terms "comprising," "having," and any variations thereof in the specification, claims, and related parts of this invention are intended to cover non-exclusive inclusion.

[0034] Example 1

[0035] Figure 1 This is a schematic diagram of the structure of the media resonance membrane separation wastewater treatment equipment in this embodiment. Figure 2 This is a top view of the media resonance membrane separation structure in the media resonance membrane separation wastewater treatment equipment of this embodiment. Figure 3 for Figure 2 Enlarged view of point A (support pipe 500 not shown). Figure 4 This is a schematic diagram of the membrane filter structure in the media resonance membrane separation wastewater treatment equipment of this embodiment. Figure 5 This is a schematic diagram of the structure of the dielectric resonator in the dielectric resonator membrane separation wastewater treatment equipment of this embodiment.

[0036] like Figure 1-5 As shown, the media resonance membrane separation wastewater treatment equipment of this embodiment has an inlet pipe 100, an outlet pipe 200, and a media resonance membrane separation structure disposed between the inlet pipe 100 and the outlet pipe 200. The media resonance membrane separation structure includes a membrane separation component, a media resonance component, and a support pipe 500.

[0037] The membrane separation assembly includes at least two membrane separation units 300, each membrane separation unit 300 including a membrane filter 310 and a product water pipe 320; the media resonance assembly includes at least two media resonance units 400, each media resonance unit 400 including a media resonator 410 and a support rod 420; the support pipe 500 is connected to the outlet pipe 200; wherein, the membrane separation units 300 and the media resonance units 400 are alternately arranged below the support pipe 500; the upper end of the product water pipe 320 is connected to the support pipe 500; the upper end of the support rod 420 is fastened to the outside of the support pipe 500; in use, wastewater enters the lower part of the membrane separation assembly from the inlet pipe 100, and the clear liquid filtered by the membrane filter 310 flows sequentially through the product water pipe 320, the support pipe 500 and the outlet pipe 200 before being discharged, and the particulate matter attached to the surface of the membrane filter 310 is detached under the vibration of the media resonator 410.

[0038] The supporting pipe 500 is an annular pipe, and the membrane separation unit 300 and the media resonance unit 400 are arranged in an annular manner. This allows for the arrangement of as many membrane filters 310 as possible within a limited space, thereby increasing the membrane area 311 and improving the water output efficiency. Both the media resonance unit 400 and the membrane separation unit 300 are arranged at an oblique angle to the horizontal plane, which makes the structure of the media resonance membrane separation structure more stable.

[0039] Each membrane filter 310 includes oppositely arranged membrane sheets 311 and a support and flow guiding mechanism disposed between the two membrane sheets 311. The angle between the membrane surface of the membrane sheet 311 and the horizontal plane is 50° to 70°. In this way, the inclined array membrane separation assembly has the characteristics of high-efficiency inclined plate sedimentation, which is highly efficient and energy-saving, improves filtration efficiency and saves land. In this embodiment, the support and flow guiding structure includes a frame 312 and spaced-apart flow guiding blocks 313. The frame 312 is provided with an outlet 314 adapted to the product water pipe 320, and a through clear liquid flow channel is formed between the flow guiding blocks 313.

[0040] The angle ∠1 between the membrane 311 and the diameter of the supporting pipe 500 is 11–14°. This significantly increases the number of membrane filters 310 compared to a configuration where the membrane 311 is parallel to the diameter of the supporting pipe 500. The membrane filters 310 are placed at an angle ∠2 with the horizontal plane, which is 45–60°. This umbrella-shaped arrangement of the membrane filters 310 allows for a larger number of membrane filters 310 to be arranged within a limited space, significantly increasing the filtration area of ​​the membrane separation assembly. In this embodiment, the angle ∠1 between the membrane filter 310 and the diameter of the supporting pipe 500 is specifically 13°, and the angle ∠2 between the membrane filter 310 and the horizontal plane is specifically 60°.

[0041] The diameter ratio of the support pipe 500 to the product water pipe 320 is 2:1, thereby reducing the flow resistance of the clear liquid.

[0042] The outer shell 411 of the dielectric resonator 410 is connected to the support rod 420 above it. A positioner 412 is provided in the middle of the outer shell 411, and a resonance mechanism is provided on both sides of the positioner 412. The resonance mechanism includes a fixed magnet 413, an iron core 414, a resonant plate 415, a rigid rod 416, and a resonant diaphragm 417 connected in sequence. A coil 418 is wound around the iron core 414. The rigid rod 416 passes through the outer shell 411 of the dielectric resonator 410. A waterproof gasket 419 adapted to the rigid rod 416 is provided on the outer shell 411. It can be seen that each dielectric resonator 410 has two resonant diaphragms 417. Both resonant diaphragms 417 are attached to the membrane sheet 311 of the adjacent membrane filter 310 and are located at the center of the membrane sheet 311.

[0043] Preferably, the two resonant diaphragms 417 are not arranged in parallel, but in a special arrangement: one resonant diaphragm 417 is perpendicular to the rigid rod 416, while the other resonant diaphragm 417 is not perpendicular to the rigid rod 416. This not only ensures that the resonant diaphragms 417 on both sides of the dielectric resonator 410 can fit tightly with the adjacent diaphragms, ensuring that the diaphragms on both sides can vibrate fully, but also facilitates the arrangement and installation of the dielectric resonator 410.

[0044] The support rod 420 has a hollow structure, and the conductive wire of the dielectric resonator 410 is located inside the support rod 420. By passing current of different frequencies through the conductive wire, the dielectric resonator 410 can generate vibrations of different frequencies.

[0045] The distance between the liquid level inside the wastewater treatment equipment and the top of the casing is 15-25 cm. This maximizes the use of the internal space of the equipment while preventing liquid from overflowing the casing. In this embodiment, the distance between the supporting pipe 500 and the liquid level inside the wastewater treatment equipment is specifically 15 cm.

[0046] Example 2

[0047] Figure 6 This is a schematic diagram of the structure of the media resonance membrane separation wastewater treatment equipment in this embodiment.

[0048] Based on Example 1, the media resonance membrane separation wastewater treatment equipment of this embodiment further has the following configuration: Figure 6 As shown, each dielectric resonance unit 400 includes two dielectric resonators 410 connected in series, thereby significantly improving the resonance effect.

[0049] Example 3

[0050] Figure 7 This is a schematic diagram of the structure of the media resonance membrane separation wastewater treatment equipment in this embodiment. Figure 8 This is a top view of the media resonance membrane separation wastewater treatment equipment in this embodiment (the spiral filter press mechanism is not shown).

[0051] Based on Example 1, the media resonance membrane separation wastewater treatment equipment of this embodiment further has the following configuration: Figure 7-8 As shown, the wastewater treatment equipment includes, from bottom to top, a chemical dosing and sludge collection zone I, a buffer zone II, a water distribution zone III, a sedimentation and separation zone IV, and an overflow zone V; the chemical dosing and sludge collection zone I is equipped with a chemical dosing pipe 610, a spiral filter press mechanism, and a sludge outlet 630, and the sludge outlet 630 is equipped with a valve; the water inlet pipe 100 is located in the water distribution zone III; the membrane filter 310 and the media resonator 410 are arranged in the sedimentation and separation zone IV; and the overflow zone V is equipped with an overflow trough 700.

[0052] In this way, after the flocculant is added, the precipitated particles are thoroughly mixed with the flocculant, and the particles adhere to each other. Under the slow stirring of the spiral filter press, the particles are concentrated into high-concentration sludge, which helps to improve the efficiency of subsequent sludge treatment. At the same time, the supernatant formed by the natural sedimentation of wastewater in the wastewater treatment equipment overflows into the overflow tank 700 and is discharged, which may further improve the effluent efficiency.

[0053] The height ratio of the dosing and sludge collection zone I, buffer zone II, water distribution zone III, sedimentation and separation zone IV, and overflow zone V is (4-5):(4-5):(2-3):(6-8):(0.8-1.5), and the volume ratio is (0.3-0.8):(8-10):(9-11):(20-25):(3-4). Therefore, the arrangement of each area within the equipment is reasonable, allowing for good filtration speed and treatment efficiency in a relatively small footprint, making it very suitable for use in confined spaces. In this embodiment, the height ratio is specifically 4:5:3:7:1, and the volume ratio is specifically 0.8:9:10:23.5:3.

[0054] The dosing pipe 610 is used to add flocculant. Preferably, the dosing pipe 610 has staggered outlet holes at the end. This increases the head loss of the flocculant and reduces the flocculant flow rate, thus preventing the particles from failing to flocculate and settle due to excessively high flocculant flow rate.

[0055] The water inlet pipe 100 is tree-shaped and has a main water inlet pipe 110 and multiple water inlet branch pipes 120. Each water inlet branch pipe 120 is provided with multiple water outlets. The pipe diameter ratio of the main water inlet pipe 110 to the water inlet branch pipes 120 is 2:1, which makes the water distribution more uniform.

[0056] In Example 1, only a conical sludge settling zone is set below the water distribution zone III. In this example, the sludge settling zone includes a buffer zone II and a chemical dosing and sludge collection zone I. The cross-sectional area of ​​the buffer zone II decreases from top to bottom. The chemical dosing and sludge collection zone I has a vertical pipe section 640 and a conical pipe section 650. The dosing pipe 610 is located in the vertical pipe section 640. The spiral filter press mechanism has variable diameter spiral blades adapted to the conical pipe section 650. Compared with Example 1, the media resonance membrane separation wastewater treatment equipment of Example 2 further reduces the cross-sectional size of the chemical dosing and sludge collection zone I. This not only allows the particulate matter and flocculant to be mixed more evenly, but also allows the variable diameter spiral blades to achieve a better compression effect with less energy consumption.

[0057] The spiral filter press mechanism further includes a rotating shaft 622 and a motor 623. The rotating shaft 622 is coaxially arranged with the wastewater treatment equipment, and the motor 623 is located on the top of the wastewater treatment equipment. An embodiment of the wastewater treatment method of the present invention uses a media resonance membrane separation wastewater treatment device from any of the above embodiments, where the wastewater is tunnel construction wastewater.

[0058] The foregoing has described the relevant content of the present invention. Those skilled in the art will be able to implement the present invention based on these descriptions. All other embodiments obtained by those skilled in the art based on the above description of the present invention without inventive effort should fall within the scope of protection of the present invention.

Claims

1. A media resonance membrane separation wastewater treatment device, comprising an inlet pipe (100) and an outlet pipe (200), characterized in that: It also includes a medium resonance membrane separation structure disposed between the water inlet pipe (100) and the water outlet pipe (200); The dielectric resonant film separation structure includes: The membrane separation assembly includes at least two membrane separation units (300), each membrane separation unit (300) including a membrane filter (310) and a product water pipe (320); each membrane filter (310) includes membrane sheets (311) disposed opposite to each other and a support and flow guiding mechanism disposed between the two membrane sheets (311); The dielectric resonance assembly includes at least two dielectric resonance units (400). Each dielectric resonance unit (400) includes a dielectric resonator (410) and a support rod (420). The outer shell (411) of each dielectric resonator (410) is connected to the support rod (420) above it. A locator (412) is provided in the middle of the outer shell (411). Resonance mechanisms are provided on both sides of the locator (412). The resonance mechanism includes a fixed magnet (413), an iron core (414), a resonant plate (415), a rigid rod (416), and a resonant diaphragm (417) connected in sequence. A coil (418) is wound around the iron core (414). The rigid rod (416) passes through the outer shell (411) of the dielectric resonator (410). A waterproof gasket (419) adapted to the rigid rod (416) is provided on the outer shell (411). The resonant diaphragm (417) is attached to the membrane (311) of the membrane filter (310). A support pipe (500) is connected to a water outlet pipe (200); The membrane separation unit (300) and the medium resonance unit (400) are alternately arranged below the support pipe (500); the upper end of the product water pipe (320) is connected to the support pipe (500); and the upper end of the support rod (420) is fastened to the outside of the support pipe (500). Wastewater enters the lower part of the membrane separation unit through the inlet pipe (100). After being filtered by the membrane filter (310), the clear liquid flows through the product water pipe (320), the support pipe (500) and the outlet pipe (200) in sequence before being discharged. The particles attached to the surface of the membrane filter (310) are detached under the vibration of the media resonator (410).

2. The media resonance membrane separation wastewater treatment equipment as described in claim 1, characterized in that: The supporting pipe (500) is an annular pipe, and the membrane separation unit (300) and the medium resonance unit (400) are arranged in an annular manner.

3. The media resonance membrane separation wastewater treatment equipment as described in claim 1, characterized in that: Each dielectric resonant unit (400) includes two dielectric resonators (410) connected in series.

4. The media resonance membrane separation wastewater treatment equipment as described in claim 1, characterized in that: The support rod (420) has a hollow structure, and the conductive wires of the dielectric resonator (410) are located inside the support rod (420).

5. The media resonance membrane separation wastewater treatment equipment as described in claim 1, characterized in that: The wastewater treatment equipment comprises, from bottom to top, the following components: The dosing and sludge collection area (I) is provided with a dosing pipe (610), a spiral filter press mechanism and a sludge outlet (630); Buffer (II), the cross-sectional area of ​​which decreases from top to bottom; Water distribution area (III), wherein the water inlet pipe (100) is located in water distribution area (III); The sedimentation separation zone (IV) is in which the membrane filter (310) and the media resonator (410) are arranged; Overflow area (V), wherein an overflow trough (700) is provided in the overflow area (V).

6. The media resonance membrane separation wastewater treatment equipment as described in claim 5, characterized in that: The dosing and sludge collection area (I) has a vertical pipe section (640) and a conical pipe section (650). The dosing pipe (610) is located in the vertical pipe section (640). The spiral filter press mechanism has variable diameter spiral blades adapted to the conical pipe section (650). The water inlet pipe (100) is dendritic.

7. The media resonance membrane separation wastewater treatment equipment as described in claim 5, characterized in that: The height ratio of the dosing and sludge collection zone (I), buffer zone (II), water distribution zone (III), sedimentation and separation zone (IV), and overflow zone (V) is (4-5):(4-5):(2-3):(6-8):(0.8-1.5), and the volume ratio is (0.3-0.8):(8-10):(9-11):(20-25):(3-4).

8. A wastewater treatment method, characterized in that: The wastewater treatment equipment using the medium resonance membrane separation method as described in any one of claims 1-7 is adopted.

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